WELCOME

INTRODUCING

STUDENTS ARE GOING TO INTRODUCE THEMSELVES, THEIR SCHOOL AND THEIR COUNTRY.

1st step

Part 1 PEOPLE AND CHEMISTRYINTRODUCE THE TOPIC■ Do you have any chemicals/chemical products in your home?■ What chemicals/chemical products do you have in your home?

2nd step

Part 2 CHEMISTRY IN OUR HOMES

In Parts 1 and 2 students find out more about the manychemical products which people use in their homes. They alsoexamine the labelling of these products and learn about theinternational symbols for labelling chemical substances.They have an opportunity to make and test a chemicalproduct

STEP 3 LIVING WITH CHEMISTRY

STEP 3 LIVING WITH CHEMISTRYResearch by interview, or from secondary sources, to investigate a local story related to chemistry and to discover an example of the importance of chemistry to the local, regional or national economy.

mercoledì 3 giugno 2009

The ethilic alcohol helps the breakup of the bond between the fat acid and the glycerine, that is it favours the hydrolysis.

The sodium chloride replaces the water and forms the molecules of soap.

26.We put the mixture of alcohol, oil, caustic soda and water in the water with sodium chloride.27.We put the mixture and we allowed to rest a little time.28.We filtered with a filter paper and a funnel the content of the becker.29.We got some micelles of soap.30.We rinsed produced soap with water to remove caustic soda, used during the production of

21.After saponification, we waited some seconds.22.We removed the erlenmeyer flask from the becker on the heater.23.We allowed to cool the mixture in the erlenmeyer flask.24.We measured 15 grams of sodium chloride and 60 ml of water.25.We put the water in a becker and we untied sodium chloride in the water in the becker.

16.We added the olive oil in the erlenmeyer flask.17.We turned the mixture in the erlenmeyer flask with a plastic spoon.18.We made attention that the mixture always boiled not very strong.19.We waited that the mixture become soap that is it grew tick.20.The isothermic reaction produces heat.

11.We used a spalsher to add the water.12.We used a turkey baster to remove the water in excess, in this way the water in the becker

didn’t fall in the erlenmeyer flask.13.We took a fat:the extrravergin olive oil which is a mixture of triglicerides.14.We measured 10 millimeters of olive oil.15.We waited that the mixture of water, alcohol and caustic soda in the erlenmeyer flask boiled.

6.We added the caustic soda in the erlenmeyer flask.7.We put on an heater a becher, full of water.8.We waited that the water boiled in the becher.9.We put the erlenmeyer flask (with the watrer, the alcohol and the caustic soda) in the becker.10.We set the erlenmeyer flask on a clamp, because the mixture inside the beuta didn’t mix with